扩展程序包含的某些UI组件，例如： popups, sidebars, options pages ，实际上可以用如下方式统一定义：
browser_action, page_action, sidebar_action, 或 options_ui) 以指向其对应的页面这种方式面临的一个挑战是如何使用浏览器自带的样式，以使得组件的UI表现与浏览器的UI风格相符。要解决这个问题，可以在该字段的配置中增加一个可字段 browser_sytle ，如果设置了这个字段并且值为 true , 那么该UI组件的HTML将会被插入一个或多个样式表，样式表会使你的扩展程序的UI表现与浏览器的风格一致 (并且与其它同样应用了这个字段的扩展程序一致)。
若使用了 browser_style: true , 你需要在不同的浏览器主题中测试你的扩展程序，以确保其UI表现和期望的一致。
谷歌浏览器Google Chrome 和 欧朋浏览器 Opera 使用字段名 chrome_style 而非browser_style, 因此如果要适配它们，你需要同时添加这两个字段。
在火狐浏览器中，这个样式文件可以在 chrome://browser/content/extension.css查看。为Mac OS X系统额外准备的样式文件也可以在 chrome://browser/content/extension-mac.css 查看。
大多数样式是自动应用的，但是某些元素需要添加非标准的类名 browser-style 来获得其样式，如下表所示：
| Element | Example |
|---|---|
<button> |
<button class="browser-style">Click me</button> |
<select class="browser-style" name="select"> <option value="value1">Value 1</option> <option value="value2" selected>Value 2</option> <option value="value3">Value 3</option> </select> |
|
<textarea> |
<textarea class="browser-style">Write here</textarea> |
Parent of an <input> |
<div class="browser-style"> <input type="radio" id="op1" name="choices" value="op1"/> <label for="op1">Option 1</label> <input type="radio" id="op2" name="choices" value="op2"/> <label for="op2">Option 2</label> </div> |
查看 {{bug(1465256)}} 以了解相关修订
{{Compat("webextensions.browser_style")}}
非标准
此功能不是通用标准，仅支持在firefox中使用
chrome://browser/content/extension.css 样式文件中也包含了火狐面板组件的样式
legacy Firefox Style Guide 使用示例
| Element | Example |
|---|---|
| Header |
<header class="panel-section panel-section-header"> <div class="icon-section-header"><img src="image.svg"/></div> <div class="text-section-header">Header</div> </header> |
| Footer |
<footer class="panel-section panel-section-footer"> <button class="panel-section-footer-button">Cancel</button> <div class="panel-section-footer-separator"></div> <button class="panel-section-footer-button default">Confirm</button> </footer> |
| Tabs |
<div class="panel-section panel-section-tabs"> <button class="panel-section-tabs-button selected">Tab</button> <div class="panel-section-tabs-separator"></div> <button class="panel-section-tabs-button">Tab</button> <div class="panel-section-tabs-separator"></div> <button class="panel-section-tabs-button">Tab</button> </div> |
| Form |
<div class="panel-section panel-section-formElements">
<div class="panel-formElements-item">
<label for="name01">Label:</label>
<input type="text" value="Name" id="name01" />
</div>
<div class="panel-formElements-item">
<label for="picker01">Label:</label>
<select id="picker01">
<option value="value1" selected="true">Dropdown</option>
<option value="value2">List Item</option>
<option value="value3">List Item</option>
</select>
</div>
<div class="panel-formElements-item">
<label for="placeholder01">Label:</label>
<input type="text" placeholder="Placeholder" id="placeholder01" />
<button name="expander" class="expander"></button>
</div>
</div>
|
| Menu |
<div class="panel-section panel-section-list">
<div class="panel-list-item">
<div class="icon"></div>
<div class="text">List Item</div>
<div class="text-shortcut">Ctrl-L</div>
</div>
<div class="panel-list-item">
<div class="icon"></div>
<div class="text">List Item</div>
<div class="text-shortcut"></div>
</div>
<div class="panel-section-separator"></div>
<div class="panel-list-item disabled">
<div class="icon"></div>
<div class="text">Disabled List Item</div>
<div class="text-shortcut"></div>
</div>
<div class="panel-section-separator"></div>
<div class="panel-list-item">
<div class="icon"></div>
<div class="text">List Item</div>
<div class="text-shortcut"></div>
</div>
<div class="panel-list-item">
<div class="icon"></div>
<div class="text">List Item</div>
<div class="text-shortcut"></div>
</div>
</div>
|
<header class="panel-section panel-section-header">
<div class="icon-section-header"><!-- An image goes here. --></div>
<div class="text-section-header">Header</div>
</header>
<div class="panel-section panel-section-list">
<div class="panel-list-item">
<div class="icon"></div>
<div class="text">List Item</div>
<div class="text-shortcut">Ctrl-L</div>
</div>
<div class="panel-list-item">
<div class="icon"></div>
<div class="text">List Item</div>
<div class="text-shortcut"></div>
</div>
<div class="panel-section-separator"></div>
<div class="panel-list-item disabled">
<div class="icon"></div>
<div class="text">Disabled List Item</div>
<div class="text-shortcut"></div>
</div>
<div class="panel-section-separator"></div>
<div class="panel-list-item">
<div class="icon"></div>
<div class="text">List Item</div>
<div class="text-shortcut"></div>
</div>
<div class="panel-list-item">
<div class="icon"></div>
<div class="text">List Item</div>
<div class="text-shortcut"></div>
</div>
</div>
<footer class="panel-section panel-section-footer">
<button class="panel-section-footer-button">Cancel</button>
<div class="panel-section-footer-separator"></div>
<button class="panel-section-footer-button default">Confirm</button>
</footer>
/* Global */
html,
body {
background: white;
box-sizing: border-box;
color: #222426;
cursor: default;
display: flex;
flex-direction: column;
font: caption;
margin: 0;
padding: 0;
-moz-user-select: none;
}
body * {
box-sizing: border-box;
text-align: start;
}
button.panel-section-footer-button,
button.panel-section-tabs-button {
color: inherit;
background-color: unset;
font: inherit;
text-shadow: inherit;
-webkit-appearance: none;
-moz-appearance: none;
appearance: none;
border: none;
}
/* Panel Section */
.panel-section {
display: flex;
flex-direction: row;
}
.panel-section-separator {
background-color: rgba(0, 0, 0, 0.15);
min-height: 1px;
}
/* Panel Section - Header */
.panel-section-header {
border-bottom: 1px solid rgba(0, 0, 0, 0.15);
padding: 16px;
}
.panel-section-header > .icon-section-header {
background-position: center center;
background-repeat: no-repeat;
height: 32px;
margin-right: 16px;
position: relative;
width: 32px;
}
.panel-section-header > .text-section-header {
align-self: center;
font-size: 1.385em;
font-weight: lighter;
}
/* Panel Section - List */
.panel-section-list {
flex-direction: column;
padding: 4px 0;
}
.panel-list-item {
align-items: center;
display: flex;
flex-direction: row;
height: 24px;
padding: 0 16px;
}
.panel-list-item:not(.disabled):hover {
background-color: rgba(0, 0, 0, 0.06);
border-bottom: 1px solid rgba(0, 0, 0, 0.1);
border-top: 1px solid rgba(0, 0, 0, 0.1);
}
.panel-list-item:not(.disabled):hover:active {
background-color: rgba(0, 0, 0, 0.1);
}
.panel-list-item.disabled {
color: #999;
}
.panel-list-item > .icon {
flex-grow: 0;
flex-shrink: 0;
}
.panel-list-item > .text {
flex-grow: 10;
}
.panel-list-item > .text-shortcut {
color: #808080;
font-family: "Lucida Grande", caption;
font-size: .847em;
justify-content: flex-end;
}
.panel-section-list .panel-section-separator {
margin: 4px 0;
}
/* Panel Section - Footer */
.panel-section-footer {
background-color: rgba(0, 0, 0, 0.06);
border-top: 1px solid rgba(0, 0, 0, 0.15);
color: #1a1a1a;
display: flex;
flex-direction: row;
height: 41px;
margin-top: -1px;
padding: 0;
}
.panel-section-footer-button {
flex: 1 1 auto;
height: 100%;
margin: 0 -1px;
padding: 12px;
text-align: center;
}
.panel-section-footer-button > .text-shortcut {
color: #808080;
font-family: "Lucida Grande", caption;
font-size: .847em;
}
.panel-section-footer-button:hover {
background-color: rgba(0, 0, 0, 0.06);
}
.panel-section-footer-button:hover:active {
background-color: rgba(0, 0, 0, 0.1);
}
.panel-section-footer-button.default {
background-color: #0996f8;
box-shadow: 0 1px 0 #0670cc inset;
color: #fff;
}
.panel-section-footer-button.default:hover {
background-color: #0670cc;
box-shadow: 0 1px 0 #005bab inset;
}
.panel-section-footer-button.default:hover:active {
background-color: #005bab;
box-shadow: 0 1px 0 #004480 inset;
}
.panel-section-footer-separator {
background-color: rgba(0, 0, 0, 0.1);
width: 1px;
z-index: 99;
}
/* Example specific – not part of chrome://browser/content/extension.css */
body {
background: #fcfcfc;
background-clip: padding-box;
border: 1px solid rgba(24,26,27,.2);
box-shadow: 0 3px 5px rgba(24,26,27,.1),0 0 7px rgba(24,26,27,.1);
box-sizing: content-box;
margin: 2em auto .5em;
width: 384px;
}
html {
min-height: 100vh;
}
html > body {
margin: auto;
}
.icon-section-header {
background-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMiIgaGVpZ2h0PSIzMiIgdmlld0JveD0iMCAwIDMyIDMyIj48Y2lyY2xlIGZpbGw9IiMzNjM5NTkiIGN4PSIxNSIgY3k9IjE1IiByPSIxNSIvPjwvc3ZnPg==");
}
{{EmbedLiveSample("Example","640","360")}}